Here are your best options:
The FiberHome HG6243C is a popular Gigabit Passive Optical Network (GPON) Optical Network Unit (ONU) widely distributed by Internet Service Providers (ISPs) globally. Why Firmware Updates Matter
Let me know your ISP and region, and I can provide more specific guidance. download firmware fiberhome hg6243c link
Turn your router upside down and look at the physical sticker.
Fixes critical vulnerabilities that protect your network from hackers. Here are your best options: The FiberHome HG6243C
Your ISP completely manages the configuration profile of your FiberHome HG6243C.
: Users often share firmware for specific modifications (like permanent WAN access) on forums or groups like RT RW NET Indonesia, but use these with caution as they are unofficial. How to Update Your Firmware How to Update Your Firmware Using the wrong
Using the wrong firmware version can "brick" your device. It is highly recommended to let your ISP manage these updates. FiberHome HG6243C